WABCO OptiTire User guide

OPTITIRETM
TIRE PRESSURE MONITORING
FOR COMMERCIAL VEHICLES
SYSTEM DESCRIPTION

Table of contents
Original document:
The German version of this document is the original document.
Translation of the original document:
All non-German language editions of this document are translations of
the original document.
Edition 2 (08.2019)
Document number: 815 010 229 3 (en)
You will nd the current edition at:
http://www.wabco.info/i/533

3
Table of contents
Table of contents
1 List of abbreviations ........................................................................................................................................ 5
2 Symbols used................................................................................................................................................... 6
3 Safety information............................................................................................................................................ 7
4 Introduction ...................................................................................................................................................... 8
5 System description ........................................................................................................................................ 10
5.1 Basic OptiTire function.......................................................................................................................... 10
5.2 Conguration for bus and towing vehicle.............................................................................................. 11
5.3 Conguration for trailers........................................................................................................................ 14
5.3.1 OptiTire in trailer operation...................................................................................................... 18
5.4 Expert’s report / certicates .................................................................................................................. 19
5.4.1 ATEX ....................................................................................................................................... 19
5.4.2 Radio approvals ...................................................................................................................... 19
5.4.3 OptiTire RF declaration of conformity...................................................................................... 20
6 Components ................................................................................................................................................... 21
6.1 Sensors................................................................................................................................................. 21
6.1.1 The external sensor (WM2)..................................................................................................... 22
6.1.2 The internal sensor (WIS) ....................................................................................................... 27
6.1.3 The internal sensor (SMS) ...................................................................................................... 30
6.2 ECU – The electronic control unit ......................................................................................................... 31
6.3 WABCO display .................................................................................................................................... 32
6.4 Connecting cables ................................................................................................................................ 32
6.7 WABCO TPMS Manager ...................................................................................................................... 39
7 Installation ...................................................................................................................................................... 41
7.1 Safety information................................................................................................................................. 41
7.3 Assembly of the internal sensor WIS.................................................................................................... 45
7.4 Assembly of the internal sensor SMS................................................................................................... 48
7.5 Assembly of the tire .............................................................................................................................. 51
7.6 Mounting the ECU in bus / towing vehicle ............................................................................................ 52
7.7 Wiring in towing vehicle/bus.................................................................................................................. 54
7.8 Mounting the ECU in the trailer............................................................................................................. 55
7.9 Wiring in trailer...................................................................................................................................... 57
8 Requirements for start-up ............................................................................................................................. 58
8.1 Training ................................................................................................................................................. 58
8.2 Diagnostic Software.............................................................................................................................. 58
8.3 Diagnostic hardware ............................................................................................................................. 59
8.4 Installing the Diagnostic Software......................................................................................................... 59
9 Start-up ........................................................................................................................................................... 60
9.1 Starting the Diagnostic Software........................................................................................................... 60
9.2 Parameter setting.................................................................................................................................. 60
9.2.1 Reading in a parameter set..................................................................................................... 60

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Table of contents List of abbreviations
9.2.2 Selection/entry of parameter data ........................................................................................... 60
9.2.3 Stimulating the sensors........................................................................................................... 61
9.2.4 Warninglampconguration..................................................................................................... 62
9.2.5 Change ECU address (Trailer Train) (Trailer ECUs only)........................................................ 62
9.2.6 Country-specicadjustments .................................................................................................. 62
9.2.7 Expert parameters................................................................................................................... 63
9.3 Module reception .................................................................................................................................. 64
9.4 Assignment test .................................................................................................................................... 64
9.5 Finalising start-up.................................................................................................................................. 64
10 Operation ........................................................................................................................................................ 65
10.1 Warning signals..................................................................................................................................... 65
10.2 Switching on of ignition ......................................................................................................................... 65
10.3 Checking pressure values..................................................................................................................... 66
10.4 Display of faults..................................................................................................................................... 67
10.5 Adjusting tire pressures ........................................................................................................................ 69
10.6 Display of system errors ....................................................................................................................... 69
10.7 Display via SmartBoard ........................................................................................................................ 71
11 Workshop notes ............................................................................................................................................. 72
11.1 Maintenance ......................................................................................................................................... 72
11.2 Replacement and repair........................................................................................................................ 72
11.2.1 Replacing an IVTM ECU with an OptiTire ECU ...................................................................... 72
11.2.2 Replacing 1st generation external sensor with a 2nd generation sensor................................ 72
11.2.3 Wheel change ......................................................................................................................... 72
11.2.4 Replacing PA tubes (external sensor) .................................................................................... 74
11.2.5 Creeping pressure loss ........................................................................................................... 74
11.2.6 No signal received from the sensor......................................................................................... 75
12 Disposal .......................................................................................................................................................... 77
13 WABCOregionalofces................................................................................................................................ 78

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List of abbreviations
1 List of abbreviations
ABBREVIATION MEANING
ADR (French: Accord européen relatif au transport international des marchandises Dangereuses par
Route); European agreement concerning the international carriage of dangerous goods by road
CAN Controller Area Network; asynchronous serial bus system for networking control units in vehicles
ECAS Electronically Controlled Air Suspension
ECU Electronic Control Unit
GND Ground; earth
ID Identier
TEBS Electronic Braking System for Trailers
VCS Vario-Compact-System; compactly structured ABS for trailers
WIS Wheel Internal Sensor
WM2 Wheel Sensor 2; external wheel sensor or module
SMS Strap Mounted Sensor; internal (wheel) sensor module
TPMS Tire Pressure Monitoring System
UDS Unied Diagnostic Services
VIN Vehicle Identication Number

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Symbols used
2 Symbols used
Symbols used
DANGER
The signal word denotes a hazard with a high degree of risk which, if not avoided, will result in death
or serious injury.
WARNING
The signal word denotes a hazard with a medium degree of risk which, if not avoided, can result in
death or serious injury.
CAUTION
The signal word denotes a hazard with a low degree of risk which, if not avoided, may result in minor
or moderate injury.
NOTICE
The signal word denotes a hazard which, if not avoided, can result in material damage.
Important information, notes and/or tips
Reference to information on the internet
Descriptive text
–Action step
1. Action step 1 (in ascending order)
2. Action step 2 (in ascending order)
ÖConsequence of an action
Listing
• Listing
Note on the use of a tool / WABCO tool

7
Safety information
3 Safety information
Observe all necessary regulations and instructions:
Read this document carefully.
Adhere to all instructions, information and safety information to prevent injury to persons and
damage to property.
WABCO will only guarantee the safety, reliability and performance of their products and systems if
all the information in this publication is adhered to.
Always abide by the vehicle manufacturer's specications and instructions.
Observe all accident regulations of the respective company as well as regional and national
regulations.
Make provisions for a safe work environment:
Only trained and qualied technicians may carry out work on the vehicle.
Use personal protective equipment if required (safety goggles, respiratory protection, ear protectors,
etc.).
Ensure that the workplace is dry and provided with sufcient lighting.
Pedal actuations can lead to severe injuries if persons are in the vicinity of the vehicle. Make sure
that pedals cannot be actuated as follows:
– Switch the transmission to "neutral" and actuate the park brake.
– Secure the vehicle against rolling by using chocks.
– Fasten a note clearly visible to the steering wheel indicating that work is being performed on the
vehicle and that the pedals are not to be actuated.

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Introduction Introduction
4 Introduction
This document describes the function and installation of the OptiTire tire pressure monitoring system.
WABCO OptiTire is the next generation of tire pressure monitoring for commercial vehicles and
replaces the predecessor system IVTM.
OptiTire was specially developed to reduce the running costs for eets and increase safety.
Reduce downtimes and extend tire life
The need to maintain the correct tire pressure seems self-evident, but in reality the tire pressure is
checked far too infrequently. Lack of time, inattention and complacency are some of the reasons for
this. An ofcial study has found that more than 30 % of all truck breakdowns are caused by tire issues.
Further studies have shown that over or under ination of 15% can reduce the life of a tire by more than
10 %.
With under-inated tires there is an increased risk of sustained overheating. This can cause terminal
damage to the casing. WABCO OptiTire helps to maintain the correct tire pressure and to detect slow
punctures early.
Downtimes
Tire damage is the most frequent reason for commercial vehicle vehicles to be out of service.
Tires
32 %
Electrics
29 %
Engine
21 %
Other
2 %
Consumables
4 %
Brakes
6 %
Cut fuel costs and minimise CO2emissions
Fuel is the largest variable cost for eet operators. With diesel prices more frequently going up than
down, fuel economy is of paramount importance.
Studies by the tire industry have conrmed that the increased rolling resistance of under-inated tires
has a negative impact on fuel consumption and increases CO2emissions. Tires that maintain the
correct air pressure, on the other hand, can reduce fuel consumption by up to 2 % and reduce CO2
emissions.

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Introduction
Fuelefciency
A constantly 17 % under-inated tire leads up to 1,400 litres increase in fuel consumption (200,000 km
annual mileage for long haul applications).
0%
-2%
10%
-10%-20%-30%
20% 30%
2%
4%
6%
8%
-40%-50%
10%
-60%
Pressure too high
Pressure too low
Deviation from recommended tire pressure (%)
Changes in fuel consumption (%)
Life of the tires
A deviation of 15 % from the recommended tire pressure reduces the life of a tire by more than 10 %.
0%
-10%
10%
-5%-15%
-20%
-25%-30% 15%
-20%
20%
-30%
25%
-40%
30%
5%-10%
-50%
Pressure too high
Pressure too low
Reduction of tire life (%)
Deviation from recommended tire pressure (%)
Reduce risk and improve safety
Incorrect tire pressure is dangerous and may entail the following risks:
A tire failure.
A deterioration in vehicle handling.
An extended braking distance.
WABCO’s OptiTire helps maintain tire pressure at the recommended level, preventing tire damage and
enhancing eet safety.
OptiTire cannot announce sudden, extreme tire damage caused by external effects.

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System description System description
5 System description
This chapter describes the conguration and how the OptiTire system operates. Furthermore, you will
also obtain information concerning technical reports for installing and retrotting.
5.1 Basic OptiTire function
A B A A BA A
C
A1 A2 A3 B C
LEGEND
ASensors:
External sensor WM2 (A1) or internal sensor WIS (A2) or internal sensor SMS (A3)
BElectronic Control Unit (ECU)
CDisplay
Measurement
The tire pressure is measured by sensors, the values obtained are repeatedly transmitted to the
electronic control unit via a radio signal
The actual tire pressure of each wheel is transmitted to a central ECU. The signals of all wheels are
evaluated there and the information is conveyed to a display in the driver's cab.
Evaluating
In the ECU, the measured values are compared to one another and to standard values stored as a
parameter set in the ECU.
A single OptiTire ECU can monitor up to 20 wheels + 2 spare wheels. Dual tires are measured
separately.
A warning signal is activated in the event of a critical deviation.
Normal pressure uctuations due to driving style, outside temperature changes or load are ltered.
The OptiTire system tolerates these typical pressure uctuations even on poor road sections or with
uneven load.